derive an expression for elastic potential energy of a spring
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Answer:
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Explanation:
Hooke’s Law, F = -kx, where F is the force and x is the elongation.
The work done = energy stored in stretched string = F.dx
The energy stored can be found from integrating by substituting for force,
and we find,
The energy stored = kx2/2, where x is the final elongation.
The energy density = energy/volume
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